Measurement and Instrumentation
Consider the following statement - 1. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil. 2. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit.

 Both 1 and 2 are false.
 1 is true but 2 is false.
 Both 1 and 2 are true.
  1 is false but 2 is true.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
The time/div and voltage axes of an oscilloscope have been creased. A student connects a 1 KHz, 5 V P-P square wave calibrition pulse to channel-1 of the scope and observes the screen to be as shown in the upper trace of figure. An unknown signal is connected to channel-2 (lower trace) of the scope. If the time/div and V/div on both channels are the same, the amplitude (P-P) and period of the unknown signal are respectively

 10 V, 1 ms.
 5 V, 1 ms.
 5 V, 2 ms.
  7.5 V, 2 ms.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Measurement and Instrumentation